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Files with the extension .BASE64 are known as "BASE64 MIME encoding/RFC2045".

This file format was added to our database by a visitor to this site, but no additional information was provided.

We have yet to investigate the BASE64 file extension any further, or there was simply not enough information available at the time to report accurately on the format. If you know how to open BASE64 files or even how to convert or edit them, please use the form below.

However, it is possible that other file formats exist which also use the BASE64 extension, so please let us know if you do not think the BASE64 extension matches the file format you are looking for.